Make Multiprecision tests depend on <type_traits> and BOOST_NO_CXX11_HDR_TYPE_TRAITS.
Use specific Boost.Random headers and not <boost/random.hpp> as the latter pulls in some of Boost.Math which has now moved to C++11.
As of 2021, Boost.Multiprecision does not support C++03 and fails tests
of Boost.Integer. To mitigate, we replicate the preprocessor checks of
Boost.Multiprecision to disable its use in Boost.Integer tests in C++03
mode.
